The original Gazelle is a Close Escort, escorting warships, not a patrol ship. It's a proper warship with heavy armour and particle barbette armament. It is not designed for the same role as the para-military patrol corvette.

JTAS4 wrote:Naval tactics in the Imperial Navy call for large ships to be accompanied by well-armed, small fighting craft capable of engaging the enemy at long range, before they approach the principle ships in a task force or convoy. These small ships may be fighter craft carried by the larger ships, or they may be independent close escort vessels.

baithammer wrote: ↑
The original gazelle was 300t and designed for small ship universe and by CT-S09-Fighting_Ships its described as the following.

That wasn't the original Gazelle.

The original Gazelle in JTAS4 was built with HG'79.
The version in S9 was detuned and rebuilt with HG'80.

JTAS 4 ( Which had different arms depending on if you had book 2 or book 5) is where I got the information about 300t and designed in the small ship universe, it latter got retconned by CT-S09-Fighting_Ships and every edition after that has added more variations.

baithammer wrote: ↑
JTAS 4 ( Which had different arms depending on if you had book 2 or book 5) is where I got the information about 300t and designed in the small ship universe, ...

The JTAS article does not mention how large the drop tanks are. Apparently the Gazelle is 400 Dt including the tanks, that are probably 160 Dt leaving 240 Dt in the core ship. Note that it can do J4 with tanks, J6 if it drops the tanks, and no jump at all without tanks.

The JTAS article has no alternate armament or information about other ships, only a rule for using the particle barbettes with LBB2.

The JTAS version is a curious beast.
It uses some stuff that makes you thing HG79, while the PA barbettes are from HG80. It mentions treating the PA as a heavy laser, and yet there are no rules for heavy lasers in LBB:2

I get the feeling it was cobbled together from some house rules that never made it to print.

baithammer wrote: ↑
JTAS 4 ( Which had different arms depending on if you had book 2 or book 5) is where I got the information about 300t and designed in the small ship universe, ...

The JTAS article does not mention how large the drop tanks are. Apparently the Gazelle is 400 Dt including the tanks, that are probably 160 Dt leaving 240 Dt in the core ship. Note that it can do J4 with tanks, J6 if it drops the tanks, and no jump at all without tanks.

The JTAS article has no alternate armament or information about other ships, only a rule for using the particle barbettes with LBB2.

This

THE BARBETTES
The barbettes, and their particle
accelerator weapons are not specifically
covered in Traveller Book 2. They are
a variant drawn from the material in
High Guard. and grafted onto Book 2.
Specifically. the barbettes are 5 tons
each. The particle accelerators should be
treated as heavy lasers as in Traveller
Book 2, subject to an advantageous OM
of +2 to hit. Damage from such hits
should be skewed toward crew casual·
ties, and electronic and computer
damage if there is no fibre optic back-up
present.